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Geoinformatika 2015; 2(54) : 71-78 (in Ukrainian)

ON MAGNETIC POLLUTION AND ACIDIFICATION OF SOILS FROM KYIV OUTSKIRTS
COMPARED TO BACKGROUND SOILS

K.M. Bondar1, O.О. Makiienko2, Yu.V. Kuz1

1Taras Shevchenko National University of Kyiv, 90 Vasylkivska Str., Kyiv 03022, Ukraine,
e-mail: ks_bondar@ukr.net, kuz.yulichka@mail.ru
2Kyiv all-day school no. 21, 11 Novikov-Priboj Str., Kyiv 04075, Ukraine, e-mail: o.makienko@gmail.com

Purpose. The purpose of the article is to prove a hypothetic possibility of their existing a conjoint way of magnetic and acid soil contamination of the Kyiv city metropolitan area outskirts.
Design/methodology/approach. The dependence between magnetic susceptibility (χ) and hydrogen parameter pHKCl in soddy and soddy-podzolic soils is studied in two research areas: the park area Pushcha-Voditsa (Kyiv city, Ukraine) and the area near the village Klavdiyevo-Tarasove located 40 km far from the city.
Findings. χ of surface soil horizon in Pushcha-Voditsa varies from 5 to 77·10–8 m3/kg, in Klavdiyevo-Tarasove – within 5…26·10–8 m3/kg. Areas with high values of χ in Pushcha-Voditsa tend to be closer to roads with heavy traffic. The traces of magnetic pollution defined based on the analysis of the high-temperature behavior curves of the magnetic susceptibility of soils from Pushcha-Voditsa. In the soil from Pushcha-Voditsa, as well as in the contaminated samples from the streets of Kyiv city with relatively high isothermal χ , a wide and high peak in the vicinity of 5000 was observed, interpreted as Hopkin peak, which is characteristic of fine single-domain magnetite, likely of anthropogenic origin. It is shown that the samples from Pushcha-Voditsa with high χ are likely to have low pHKCl values, i.e., there is a negative correlation between these parameters (r = –0.57). No such trend observed for the samples from the background area of Klavdiyevo-Tarasove.
Practical value/implications. The results obtained suggest a conjoint way of magnetic and acid soil contamination of the Kyiv city metropolitan area outskirts, which is a fallout of solid and liquid precipitation from the atmosphere. As a result of the high temperature transformation of iron sulfides contained in coal and other natural fuels of power plants, a particular substance comprising iron oxides and sulfur dioxide, which causes acidification of precipitation, is emitted to the atmosphere. Due to a high concentration of exhaust gases in the surface air in the vicinity of roads with heavy traffic, fine magnetic particles and nitric acid, which is formed as a result of the interaction of nitrogen dioxide with water, reach the soil.

Keywords: magnetic susceptibility, acidity, hydrogen parameter pHKCl, magnetic pollution, urban agglomeration.

The full text of papers 

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